// Copyright (c) 2016 Google Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #include #include #include #include #include "test/opt/assembly_builder.h" #include "test/opt/pass_fixture.h" #include "test/opt/pass_utils.h" namespace spvtools { namespace opt { namespace { using EliminateDeadConstantBasicTest = PassTest<::testing::Test>; TEST_F(EliminateDeadConstantBasicTest, BasicAllDeadConstants) { const std::vector text = { // clang-format off "OpCapability Shader", "OpCapability Float64", "%1 = OpExtInstImport \"GLSL.std.450\"", "OpMemoryModel Logical GLSL450", "OpEntryPoint Vertex %main \"main\"", "OpName %main \"main\"", "%void = OpTypeVoid", "%4 = OpTypeFunction %void", "%bool = OpTypeBool", "%true = OpConstantTrue %bool", "%false = OpConstantFalse %bool", "%int = OpTypeInt 32 1", "%9 = OpConstant %int 1", "%uint = OpTypeInt 32 0", "%11 = OpConstant %uint 2", "%float = OpTypeFloat 32", "%13 = OpConstant %float 3.1415", "%double = OpTypeFloat 64", "%15 = OpConstant %double 3.14159265358979", "%main = OpFunction %void None %4", "%16 = OpLabel", "OpReturn", "OpFunctionEnd", // clang-format on }; // None of the above constants is ever used, so all of them should be // eliminated. const char* const_decl_opcodes[] = { " OpConstantTrue ", " OpConstantFalse ", " OpConstant ", }; // Skip lines that have any one of const_decl_opcodes. const std::string expected_disassembly = SelectiveJoin(text, [&const_decl_opcodes](const char* line) { return std::any_of( std::begin(const_decl_opcodes), std::end(const_decl_opcodes), [&line](const char* const_decl_op) { return std::string(line).find(const_decl_op) != std::string::npos; }); }); SinglePassRunAndCheck( JoinAllInsts(text), expected_disassembly, /* skip_nop = */ true); } TEST_F(EliminateDeadConstantBasicTest, BasicNoneDeadConstants) { const std::vector text = { // clang-format off "OpCapability Shader", "OpCapability Float64", "%1 = OpExtInstImport \"GLSL.std.450\"", "OpMemoryModel Logical GLSL450", "OpEntryPoint Vertex %main \"main\"", "OpName %main \"main\"", "OpName %btv \"btv\"", "OpName %bfv \"bfv\"", "OpName %iv \"iv\"", "OpName %uv \"uv\"", "OpName %fv \"fv\"", "OpName %dv \"dv\"", "%void = OpTypeVoid", "%10 = OpTypeFunction %void", "%bool = OpTypeBool", "%_ptr_Function_bool = OpTypePointer Function %bool", "%true = OpConstantTrue %bool", "%false = OpConstantFalse %bool", "%int = OpTypeInt 32 1", "%_ptr_Function_int = OpTypePointer Function %int", "%int_1 = OpConstant %int 1", "%uint = OpTypeInt 32 0", "%_ptr_Function_uint = OpTypePointer Function %uint", "%uint_2 = OpConstant %uint 2", "%float = OpTypeFloat 32", "%_ptr_Function_float = OpTypePointer Function %float", "%float_3_1415 = OpConstant %float 3.1415", "%double = OpTypeFloat 64", "%_ptr_Function_double = OpTypePointer Function %double", "%double_3_14159265358979 = OpConstant %double 3.14159265358979", "%main = OpFunction %void None %10", "%27 = OpLabel", "%btv = OpVariable %_ptr_Function_bool Function", "%bfv = OpVariable %_ptr_Function_bool Function", "%iv = OpVariable %_ptr_Function_int Function", "%uv = OpVariable %_ptr_Function_uint Function", "%fv = OpVariable %_ptr_Function_float Function", "%dv = OpVariable %_ptr_Function_double Function", "OpStore %btv %true", "OpStore %bfv %false", "OpStore %iv %int_1", "OpStore %uv %uint_2", "OpStore %fv %float_3_1415", "OpStore %dv %double_3_14159265358979", "OpReturn", "OpFunctionEnd", // clang-format on }; // All constants are used, so none of them should be eliminated. SinglePassRunAndCheck( JoinAllInsts(text), JoinAllInsts(text), /* skip_nop = */ true); } struct EliminateDeadConstantTestCase { // Type declarations and constants that should be kept. std::vector used_consts; // Instructions that refer to constants, this is added to create uses for // some constants so they won't be treated as dead constants. std::vector main_insts; // Dead constants that should be removed. std::vector dead_consts; }; // All types that are potentially required in EliminateDeadConstantTest. const std::vector CommonTypes = { // clang-format off // scalar types "%bool = OpTypeBool", "%uint = OpTypeInt 32 0", "%int = OpTypeInt 32 1", "%float = OpTypeFloat 32", "%double = OpTypeFloat 64", // vector types "%v2bool = OpTypeVector %bool 2", "%v2uint = OpTypeVector %uint 2", "%v2int = OpTypeVector %int 2", "%v3int = OpTypeVector %int 3", "%v4int = OpTypeVector %int 4", "%v2float = OpTypeVector %float 2", "%v3float = OpTypeVector %float 3", "%v2double = OpTypeVector %double 2", // variable pointer types "%_pf_bool = OpTypePointer Function %bool", "%_pf_uint = OpTypePointer Function %uint", "%_pf_int = OpTypePointer Function %int", "%_pf_float = OpTypePointer Function %float", "%_pf_double = OpTypePointer Function %double", "%_pf_v2int = OpTypePointer Function %v2int", "%_pf_v3int = OpTypePointer Function %v3int", "%_pf_v2float = OpTypePointer Function %v2float", "%_pf_v3float = OpTypePointer Function %v3float", "%_pf_v2double = OpTypePointer Function %v2double", // struct types "%inner_struct = OpTypeStruct %bool %int %float %double", "%outer_struct = OpTypeStruct %inner_struct %int %double", "%flat_struct = OpTypeStruct %bool %int %float %double", // clang-format on }; using EliminateDeadConstantTest = PassTest<::testing::TestWithParam>; TEST_P(EliminateDeadConstantTest, Custom) { auto& tc = GetParam(); AssemblyBuilder builder; builder.AppendTypesConstantsGlobals(CommonTypes) .AppendTypesConstantsGlobals(tc.used_consts) .AppendInMain(tc.main_insts); const std::string expected = builder.GetCode(); builder.AppendTypesConstantsGlobals(tc.dead_consts); const std::string assembly_with_dead_const = builder.GetCode(); SinglePassRunAndCheck( assembly_with_dead_const, expected, /* skip_nop = */ true); } INSTANTIATE_TEST_SUITE_P( ScalarTypeConstants, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // Scalar type constants, one dead constant and one used constant. { /* .used_consts = */ { "%used_const_int = OpConstant %int 1", }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "OpStore %int_var %used_const_int", }, /* .dead_consts = */ { "%dead_const_int = OpConstant %int 1", }, }, { /* .used_consts = */ { "%used_const_uint = OpConstant %uint 1", }, /* .main_insts = */ { "%uint_var = OpVariable %_pf_uint Function", "OpStore %uint_var %used_const_uint", }, /* .dead_consts = */ { "%dead_const_uint = OpConstant %uint 1", }, }, { /* .used_consts = */ { "%used_const_float = OpConstant %float 3.1415", }, /* .main_insts = */ { "%float_var = OpVariable %_pf_float Function", "OpStore %float_var %used_const_float", }, /* .dead_consts = */ { "%dead_const_float = OpConstant %float 3.1415", }, }, { /* .used_consts = */ { "%used_const_double = OpConstant %double 3.141592653", }, /* .main_insts = */ { "%double_var = OpVariable %_pf_double Function", "OpStore %double_var %used_const_double", }, /* .dead_consts = */ { "%dead_const_double = OpConstant %double 3.141592653", }, }, // clang-format on }))); INSTANTIATE_TEST_SUITE_P( VectorTypeConstants, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // Tests eliminating dead constant type ivec2. One dead constant vector // and one used constant vector, each built from its own group of // scalar constants. { /* .used_consts = */ { "%used_int_x = OpConstant %int 1", "%used_int_y = OpConstant %int 2", "%used_v2int = OpConstantComposite %v2int %used_int_x %used_int_y", }, /* .main_insts = */ { "%v2int_var = OpVariable %_pf_v2int Function", "OpStore %v2int_var %used_v2int", }, /* .dead_consts = */ { "%dead_int_x = OpConstant %int 1", "%dead_int_y = OpConstant %int 2", "%dead_v2int = OpConstantComposite %v2int %dead_int_x %dead_int_y", }, }, // Tests eliminating dead constant ivec2. One dead constant vector and // one used constant vector. But both built from a same group of // scalar constants. { /* .used_consts = */ { "%used_int_x = OpConstant %int 1", "%used_int_y = OpConstant %int 2", "%used_int_z = OpConstant %int 3", "%used_v3int = OpConstantComposite %v3int %used_int_x %used_int_y %used_int_z", }, /* .main_insts = */ { "%v3int_var = OpVariable %_pf_v3int Function", "OpStore %v3int_var %used_v3int", }, /* .dead_consts = */ { "%dead_v3int = OpConstantComposite %v3int %used_int_x %used_int_y %used_int_z", }, }, // Tests eliminating dead cosntant vec2. One dead constant vector and // one used constant vector. Each built from its own group of scalar // constants. { /* .used_consts = */ { "%used_float_x = OpConstant %float 3.1415", "%used_float_y = OpConstant %float 4.25", "%used_v2float = OpConstantComposite %v2float %used_float_x %used_float_y", }, /* .main_insts = */ { "%v2float_var = OpVariable %_pf_v2float Function", "OpStore %v2float_var %used_v2float", }, /* .dead_consts = */ { "%dead_float_x = OpConstant %float 3.1415", "%dead_float_y = OpConstant %float 4.25", "%dead_v2float = OpConstantComposite %v2float %dead_float_x %dead_float_y", }, }, // Tests eliminating dead cosntant vec2. One dead constant vector and // one used constant vector. Both built from a same group of scalar // constants. { /* .used_consts = */ { "%used_float_x = OpConstant %float 3.1415", "%used_float_y = OpConstant %float 4.25", "%used_float_z = OpConstant %float 4.75", "%used_v3float = OpConstantComposite %v3float %used_float_x %used_float_y %used_float_z", }, /* .main_insts = */ { "%v3float_var = OpVariable %_pf_v3float Function", "OpStore %v3float_var %used_v3float", }, /* .dead_consts = */ { "%dead_v3float = OpConstantComposite %v3float %used_float_x %used_float_y %used_float_z", }, }, // clang-format on }))); INSTANTIATE_TEST_SUITE_P( StructTypeConstants, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // A plain struct type dead constants. All of its components are dead // constants too. { /* .used_consts = */ {}, /* .main_insts = */ {}, /* .dead_consts = */ { "%dead_bool = OpConstantTrue %bool", "%dead_int = OpConstant %int 1", "%dead_float = OpConstant %float 2.5", "%dead_double = OpConstant %double 3.14159265358979", "%dead_struct = OpConstantComposite %flat_struct %dead_bool %dead_int %dead_float %dead_double", }, }, // A plain struct type dead constants. Some of its components are dead // constants while others are not. { /* .used_consts = */ { "%used_int = OpConstant %int 1", "%used_double = OpConstant %double 3.14159265358979", }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "OpStore %int_var %used_int", "%double_var = OpVariable %_pf_double Function", "OpStore %double_var %used_double", }, /* .dead_consts = */ { "%dead_bool = OpConstantTrue %bool", "%dead_float = OpConstant %float 2.5", "%dead_struct = OpConstantComposite %flat_struct %dead_bool %used_int %dead_float %used_double", }, }, // A nesting struct type dead constants. All components of both outer // and inner structs are dead and should be removed after dead constant // elimination. { /* .used_consts = */ {}, /* .main_insts = */ {}, /* .dead_consts = */ { "%dead_bool = OpConstantTrue %bool", "%dead_int = OpConstant %int 1", "%dead_float = OpConstant %float 2.5", "%dead_double = OpConstant %double 3.1415926535", "%dead_inner_struct = OpConstantComposite %inner_struct %dead_bool %dead_int %dead_float %dead_double", "%dead_int2 = OpConstant %int 2", "%dead_double2 = OpConstant %double 1.428571428514", "%dead_outer_struct = OpConstantComposite %outer_struct %dead_inner_struct %dead_int2 %dead_double2", }, }, // A nesting struct type dead constants. Some of its components are // dead constants while others are not. { /* .used_consts = */ { "%used_int = OpConstant %int 1", "%used_double = OpConstant %double 3.14159265358979", }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "OpStore %int_var %used_int", "%double_var = OpVariable %_pf_double Function", "OpStore %double_var %used_double", }, /* .dead_consts = */ { "%dead_bool = OpConstantTrue %bool", "%dead_float = OpConstant %float 2.5", "%dead_inner_struct = OpConstantComposite %inner_struct %dead_bool %used_int %dead_float %used_double", "%dead_int = OpConstant %int 2", "%dead_outer_struct = OpConstantComposite %outer_struct %dead_inner_struct %dead_int %used_double", }, }, // A nesting struct case. The inner struct is used while the outer struct is not { /* .used_const = */ { "%used_bool = OpConstantTrue %bool", "%used_int = OpConstant %int 1", "%used_float = OpConstant %float 1.25", "%used_double = OpConstant %double 1.23456789012345", "%used_inner_struct = OpConstantComposite %inner_struct %used_bool %used_int %used_float %used_double", }, /* .main_insts = */ { "%bool_var = OpVariable %_pf_bool Function", "%bool_from_inner_struct = OpCompositeExtract %bool %used_inner_struct 0", "OpStore %bool_var %bool_from_inner_struct", }, /* .dead_consts = */ { "%dead_int = OpConstant %int 2", "%dead_outer_struct = OpConstantComposite %outer_struct %used_inner_struct %dead_int %used_double" }, }, // A nesting struct case. The outer struct is used, so the inner struct should not // be removed even though it is not used anywhere. { /* .used_const = */ { "%used_bool = OpConstantTrue %bool", "%used_int = OpConstant %int 1", "%used_float = OpConstant %float 1.25", "%used_double = OpConstant %double 1.23456789012345", "%used_inner_struct = OpConstantComposite %inner_struct %used_bool %used_int %used_float %used_double", "%used_outer_struct = OpConstantComposite %outer_struct %used_inner_struct %used_int %used_double" }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "%int_from_outer_struct = OpCompositeExtract %int %used_outer_struct 1", "OpStore %int_var %int_from_outer_struct", }, /* .dead_consts = */ {}, }, // clang-format on }))); INSTANTIATE_TEST_SUITE_P( ScalarTypeSpecConstants, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // All scalar type spec constants. { /* .used_consts = */ { "%used_bool = OpSpecConstantTrue %bool", "%used_uint = OpSpecConstant %uint 2", "%used_int = OpSpecConstant %int 2", "%used_float = OpSpecConstant %float 2.5", "%used_double = OpSpecConstant %double 1.42857142851", }, /* .main_insts = */ { "%bool_var = OpVariable %_pf_bool Function", "%uint_var = OpVariable %_pf_uint Function", "%int_var = OpVariable %_pf_int Function", "%float_var = OpVariable %_pf_float Function", "%double_var = OpVariable %_pf_double Function", "OpStore %bool_var %used_bool", "OpStore %uint_var %used_uint", "OpStore %int_var %used_int", "OpStore %float_var %used_float", "OpStore %double_var %used_double", }, /* .dead_consts = */ { "%dead_bool = OpSpecConstantTrue %bool", "%dead_uint = OpSpecConstant %uint 2", "%dead_int = OpSpecConstant %int 2", "%dead_float = OpSpecConstant %float 2.5", "%dead_double = OpSpecConstant %double 1.42857142851", }, }, // clang-format on }))); INSTANTIATE_TEST_SUITE_P( VectorTypeSpecConstants, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // Bool vector type spec constants. One vector has all component dead, // another vector has one dead boolean and one used boolean. { /* .used_consts = */ { "%used_bool = OpSpecConstantTrue %bool", }, /* .main_insts = */ { "%bool_var = OpVariable %_pf_bool Function", "OpStore %bool_var %used_bool", }, /* .dead_consts = */ { "%dead_bool = OpSpecConstantFalse %bool", "%dead_bool_vec1 = OpSpecConstantComposite %v2bool %dead_bool %dead_bool", "%dead_bool_vec2 = OpSpecConstantComposite %v2bool %dead_bool %used_bool", }, }, // Uint vector type spec constants. One vector has all component dead, // another vector has one dead unsigned integer and one used unsigned // integer. { /* .used_consts = */ { "%used_uint = OpSpecConstant %uint 3", }, /* .main_insts = */ { "%uint_var = OpVariable %_pf_uint Function", "OpStore %uint_var %used_uint", }, /* .dead_consts = */ { "%dead_uint = OpSpecConstant %uint 1", "%dead_uint_vec1 = OpSpecConstantComposite %v2uint %dead_uint %dead_uint", "%dead_uint_vec2 = OpSpecConstantComposite %v2uint %dead_uint %used_uint", }, }, // Int vector type spec constants. One vector has all component dead, // another vector has one dead integer and one used integer. { /* .used_consts = */ { "%used_int = OpSpecConstant %int 3", }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "OpStore %int_var %used_int", }, /* .dead_consts = */ { "%dead_int = OpSpecConstant %int 1", "%dead_int_vec1 = OpSpecConstantComposite %v2int %dead_int %dead_int", "%dead_int_vec2 = OpSpecConstantComposite %v2int %dead_int %used_int", }, }, // Int vector type spec constants built with both spec constants and // front-end constants. { /* .used_consts = */ { "%used_spec_int = OpSpecConstant %int 3", "%used_front_end_int = OpConstant %int 3", }, /* .main_insts = */ { "%int_var1 = OpVariable %_pf_int Function", "OpStore %int_var1 %used_spec_int", "%int_var2 = OpVariable %_pf_int Function", "OpStore %int_var2 %used_front_end_int", }, /* .dead_consts = */ { "%dead_spec_int = OpSpecConstant %int 1", "%dead_front_end_int = OpConstant %int 1", // Dead front-end and dead spec constants "%dead_int_vec1 = OpSpecConstantComposite %v2int %dead_spec_int %dead_front_end_int", // Used front-end and dead spec constants "%dead_int_vec2 = OpSpecConstantComposite %v2int %dead_spec_int %used_front_end_int", // Dead front-end and used spec constants "%dead_int_vec3 = OpSpecConstantComposite %v2int %dead_front_end_int %used_spec_int", }, }, // clang-format on }))); INSTANTIATE_TEST_SUITE_P( SpecConstantOp, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // Cast operations: uint <-> int <-> bool { /* .used_consts = */ {}, /* .main_insts = */ {}, /* .dead_consts = */ { // Assistant constants, only used in dead spec constant // operations. "%signed_zero = OpConstant %int 0", "%signed_zero_vec = OpConstantComposite %v2int %signed_zero %signed_zero", "%unsigned_zero = OpConstant %uint 0", "%unsigned_zero_vec = OpConstantComposite %v2uint %unsigned_zero %unsigned_zero", "%signed_one = OpConstant %int 1", "%signed_one_vec = OpConstantComposite %v2int %signed_one %signed_one", "%unsigned_one = OpConstant %uint 1", "%unsigned_one_vec = OpConstantComposite %v2uint %unsigned_one %unsigned_one", // Spec constants that support casting to each other. "%dead_bool = OpSpecConstantTrue %bool", "%dead_uint = OpSpecConstant %uint 1", "%dead_int = OpSpecConstant %int 2", "%dead_bool_vec = OpSpecConstantComposite %v2bool %dead_bool %dead_bool", "%dead_uint_vec = OpSpecConstantComposite %v2uint %dead_uint %dead_uint", "%dead_int_vec = OpSpecConstantComposite %v2int %dead_int %dead_int", // Scalar cast to boolean spec constant. "%int_to_bool = OpSpecConstantOp %bool INotEqual %dead_int %signed_zero", "%uint_to_bool = OpSpecConstantOp %bool INotEqual %dead_uint %unsigned_zero", // Vector cast to boolean spec constant. "%int_to_bool_vec = OpSpecConstantOp %v2bool INotEqual %dead_int_vec %signed_zero_vec", "%uint_to_bool_vec = OpSpecConstantOp %v2bool INotEqual %dead_uint_vec %unsigned_zero_vec", // Scalar cast to int spec constant. "%bool_to_int = OpSpecConstantOp %int Select %dead_bool %signed_one %signed_zero", "%uint_to_int = OpSpecConstantOp %uint IAdd %dead_uint %unsigned_zero", // Vector cast to int spec constant. "%bool_to_int_vec = OpSpecConstantOp %v2int Select %dead_bool_vec %signed_one_vec %signed_zero_vec", "%uint_to_int_vec = OpSpecConstantOp %v2uint IAdd %dead_uint_vec %unsigned_zero_vec", // Scalar cast to uint spec constant. "%bool_to_uint = OpSpecConstantOp %uint Select %dead_bool %unsigned_one %unsigned_zero", "%int_to_uint_vec = OpSpecConstantOp %uint IAdd %dead_int %signed_zero", // Vector cast to uint spec constant. "%bool_to_uint_vec = OpSpecConstantOp %v2uint Select %dead_bool_vec %unsigned_one_vec %unsigned_zero_vec", "%int_to_uint = OpSpecConstantOp %v2uint IAdd %dead_int_vec %signed_zero_vec", }, }, // Add, sub, mul, div, rem. { /* .used_consts = */ {}, /* .main_insts = */ {}, /* .dead_consts = */ { "%dead_spec_int_a = OpSpecConstant %int 1", "%dead_spec_int_a_vec = OpSpecConstantComposite %v2int %dead_spec_int_a %dead_spec_int_a", "%dead_spec_int_b = OpSpecConstant %int 2", "%dead_spec_int_b_vec = OpSpecConstantComposite %v2int %dead_spec_int_b %dead_spec_int_b", "%dead_const_int_c = OpConstant %int 3", "%dead_const_int_c_vec = OpConstantComposite %v2int %dead_const_int_c %dead_const_int_c", // Add "%add_a_b = OpSpecConstantOp %int IAdd %dead_spec_int_a %dead_spec_int_b", "%add_a_b_vec = OpSpecConstantOp %v2int IAdd %dead_spec_int_a_vec %dead_spec_int_b_vec", // Sub "%sub_a_b = OpSpecConstantOp %int ISub %dead_spec_int_a %dead_spec_int_b", "%sub_a_b_vec = OpSpecConstantOp %v2int ISub %dead_spec_int_a_vec %dead_spec_int_b_vec", // Mul "%mul_a_b = OpSpecConstantOp %int IMul %dead_spec_int_a %dead_spec_int_b", "%mul_a_b_vec = OpSpecConstantOp %v2int IMul %dead_spec_int_a_vec %dead_spec_int_b_vec", // Div "%div_a_b = OpSpecConstantOp %int SDiv %dead_spec_int_a %dead_spec_int_b", "%div_a_b_vec = OpSpecConstantOp %v2int SDiv %dead_spec_int_a_vec %dead_spec_int_b_vec", // Bitwise Xor "%xor_a_b = OpSpecConstantOp %int BitwiseXor %dead_spec_int_a %dead_spec_int_b", "%xor_a_b_vec = OpSpecConstantOp %v2int BitwiseXor %dead_spec_int_a_vec %dead_spec_int_b_vec", // Scalar Comparison "%less_a_b = OpSpecConstantOp %bool SLessThan %dead_spec_int_a %dead_spec_int_b", }, }, // Vectors without used swizzles should be removed. { /* .used_consts = */ { "%used_int = OpConstant %int 3", }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "OpStore %int_var %used_int", }, /* .dead_consts = */ { "%dead_int = OpConstant %int 3", "%dead_spec_int_a = OpSpecConstant %int 1", "%vec_a = OpSpecConstantComposite %v4int %dead_spec_int_a %dead_spec_int_a %dead_int %dead_int", "%dead_spec_int_b = OpSpecConstant %int 2", "%vec_b = OpSpecConstantComposite %v4int %dead_spec_int_b %dead_spec_int_b %used_int %used_int", // Extract scalar "%a_x = OpSpecConstantOp %int CompositeExtract %vec_a 0", "%b_x = OpSpecConstantOp %int CompositeExtract %vec_b 0", // Extract vector "%a_xy = OpSpecConstantOp %v2int VectorShuffle %vec_a %vec_a 0 1", "%b_xy = OpSpecConstantOp %v2int VectorShuffle %vec_b %vec_b 0 1", }, }, // Vectors with used swizzles should not be removed. { /* .used_consts = */ { "%used_int = OpConstant %int 3", "%used_spec_int_a = OpSpecConstant %int 1", "%used_spec_int_b = OpSpecConstant %int 2", // Create vectors "%vec_a = OpSpecConstantComposite %v4int %used_spec_int_a %used_spec_int_a %used_int %used_int", "%vec_b = OpSpecConstantComposite %v4int %used_spec_int_b %used_spec_int_b %used_int %used_int", // Extract vector "%a_xy = OpSpecConstantOp %v2int VectorShuffle %vec_a %vec_a 0 1", "%b_xy = OpSpecConstantOp %v2int VectorShuffle %vec_b %vec_b 0 1", }, /* .main_insts = */ { "%v2int_var_a = OpVariable %_pf_v2int Function", "%v2int_var_b = OpVariable %_pf_v2int Function", "OpStore %v2int_var_a %a_xy", "OpStore %v2int_var_b %b_xy", }, /* .dead_consts = */ {}, }, // clang-format on }))); INSTANTIATE_TEST_SUITE_P( LongDefUseChain, EliminateDeadConstantTest, ::testing::ValuesIn(std::vector({ // clang-format off // Long Def-Use chain with binary operations. { /* .used_consts = */ { "%array_size = OpConstant %int 4", "%type_arr_int_4 = OpTypeArray %int %array_size", "%used_int_0 = OpConstant %int 100", "%used_int_1 = OpConstant %int 1", "%used_int_2 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_1", "%used_int_3 = OpSpecConstantOp %int ISub %used_int_0 %used_int_2", "%used_int_4 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_3", "%used_int_5 = OpSpecConstantOp %int ISub %used_int_0 %used_int_4", "%used_int_6 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_5", "%used_int_7 = OpSpecConstantOp %int ISub %used_int_0 %used_int_6", "%used_int_8 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_7", "%used_int_9 = OpSpecConstantOp %int ISub %used_int_0 %used_int_8", "%used_int_10 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_9", "%used_int_11 = OpSpecConstantOp %int ISub %used_int_0 %used_int_10", "%used_int_12 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_11", "%used_int_13 = OpSpecConstantOp %int ISub %used_int_0 %used_int_12", "%used_int_14 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_13", "%used_int_15 = OpSpecConstantOp %int ISub %used_int_0 %used_int_14", "%used_int_16 = OpSpecConstantOp %int ISub %used_int_0 %used_int_15", "%used_int_17 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_16", "%used_int_18 = OpSpecConstantOp %int ISub %used_int_0 %used_int_17", "%used_int_19 = OpSpecConstantOp %int IAdd %used_int_0 %used_int_18", "%used_int_20 = OpSpecConstantOp %int ISub %used_int_0 %used_int_19", "%used_vec_a = OpSpecConstantComposite %v2int %used_int_18 %used_int_19", "%used_vec_b = OpSpecConstantOp %v2int IMul %used_vec_a %used_vec_a", "%used_int_21 = OpSpecConstantOp %int CompositeExtract %used_vec_b 0", "%used_array = OpConstantComposite %type_arr_int_4 %used_int_20 %used_int_20 %used_int_21 %used_int_21", }, /* .main_insts = */ { "%int_var = OpVariable %_pf_int Function", "%used_array_2 = OpCompositeExtract %int %used_array 2", "OpStore %int_var %used_array_2", }, /* .dead_consts = */ { "%dead_int_1 = OpConstant %int 2", "%dead_int_2 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_1", "%dead_int_3 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_2", "%dead_int_4 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_3", "%dead_int_5 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_4", "%dead_int_6 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_5", "%dead_int_7 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_6", "%dead_int_8 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_7", "%dead_int_9 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_8", "%dead_int_10 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_9", "%dead_int_11 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_10", "%dead_int_12 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_11", "%dead_int_13 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_12", "%dead_int_14 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_13", "%dead_int_15 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_14", "%dead_int_16 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_15", "%dead_int_17 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_16", "%dead_int_18 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_17", "%dead_int_19 = OpSpecConstantOp %int IAdd %used_int_0 %dead_int_18", "%dead_int_20 = OpSpecConstantOp %int ISub %used_int_0 %dead_int_19", "%dead_vec_a = OpSpecConstantComposite %v2int %dead_int_18 %dead_int_19", "%dead_vec_b = OpSpecConstantOp %v2int IMul %dead_vec_a %dead_vec_a", "%dead_int_21 = OpSpecConstantOp %int CompositeExtract %dead_vec_b 0", "%dead_array = OpConstantComposite %type_arr_int_4 %dead_int_20 %used_int_20 %dead_int_19 %used_int_19", }, }, // Long Def-Use chain with swizzle // clang-format on }))); } // namespace } // namespace opt } // namespace spvtools